1 /*
   2  * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "logging/log.hpp"
  27 #include "memory/metaspace/metaDebug.hpp"
  28 #include "runtime/os.hpp"
  29 #include "runtime/thread.hpp"
  30 #include "utilities/debug.hpp"
  31 #include "utilities/globalDefinitions.hpp"
  32 
  33 namespace metaspace {
  34 namespace internals {
  35 
  36 int Metadebug::_allocation_fail_alot_count = 0;
  37 
  38 void Metadebug::init_allocation_fail_alot_count() {
  39   if (MetadataAllocationFailALot) {
  40     _allocation_fail_alot_count =
  41       1+(long)((double)MetadataAllocationFailALotInterval*os::random()/(max_jint+1.0));
  42   }
  43 }
  44 
  45 #ifdef ASSERT
  46 bool Metadebug::test_metadata_failure() {
  47   if (MetadataAllocationFailALot &&
  48       Threads::is_vm_complete()) {
  49     if (_allocation_fail_alot_count > 0) {
  50       _allocation_fail_alot_count--;
  51     } else {
  52       log_trace(gc, metaspace, freelist)("Metadata allocation failing for MetadataAllocationFailALot");
  53       init_allocation_fail_alot_count();
  54       return true;
  55     }
  56   }
  57   return false;
  58 }
  59 #endif
  60 
  61 
  62 } // namespace metaspace
  63 } // namespace internals
  64 
  65 
  66